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Ubuntu: USN-4145-1 (CVE-2017-18509): Linux kernel vulnerabilities

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Ubuntu: USN-4145-1 (CVE-2017-18509): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
08/13/2019
Created
10/04/2019
Added
10/01/2019
Modified
09/12/2020

Description

An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.

Solution(s)

  • ubuntu-upgrade-linux-image-4-4-0-1059-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1095-aws
  • ubuntu-upgrade-linux-image-4-4-0-1123-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1127-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-165-generic
  • ubuntu-upgrade-linux-image-4-4-0-165-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-165-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-165-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-165-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-165-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-165-powerpc64-smp
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-virtual

References

  • USN-4069-1
  • USN-4069-2
  • USN-4115-1
  • USN-4118-1
  • USN-4144-1
  • USN-4145-1
  • USN-4147-1
  • CVE-2017-18509
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